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本文研究的样品是大港油田地质研究所选出的十套典型岩心标本(十口井共计543米岩心),是黄骅盆地下第三系中常见的一些砂体类型,时代从渐新世早期到渐新世晚期,还包括了上第三纪馆陶组地层。本区下第三系含油砂岩的陆源碎屑中石英含量一般不高,在50%以下。长石含量较高,有的可达45%左右,以斜长石和正长石为主.微斜长石较少。岩屑含量除个别井段较高外,一般在25％以下,以火山岩岩屑为主,沉积岩和变质岩岩屑很少。砂岩岩石类
The samples studied in this paper are 10 sets of typical core samples selected by the Institute of Geology of Dagang Oilfield (a total of 543m cores in 10 wells) and are some common types of sand bodies in the Lower Triassic of the Huanghua Basin. From the early Oligocene to Late Oligocene, also includes the Tertiary Guantao formation. The terrestrial clastic quartz in the Lower Tertiary oil-bearing sandstone in this area is generally not high, below 50%. Feldspar content is higher, some up to about 45%, mainly plagioclase and orthoclase feldspar less. In addition to the individual cuttings content higher, generally below 25%, mainly volcanic rock fragments, sedimentary and metamorphic rock debris. Sandstone rocks